The First NOAC Contingent Piece?

Dr. Ron Aldridge in the first volume of his "Patches and Memoribilia of the Order of the Arrow at National Event" refers to an Aluminum neckerchief slide from Shu Shu Gah Lodge #24 as the first NOAC Contingent item on page 2-14.

"40N/24NS1 This is the first known contingent item. It is an aluminum neckerchief slide picturing a flying Blue Heron, a red arrow, WWW and 1940."